Sebastian Vettel has told Autosport he hopes that Formula One's regulation changes in 2014 do not spread the field out compared to recent years.

The revised engine regulations are predicted to widen the gaps between the teams next year and Vettel said that it would be a shame if that made the season less competitive.

"It's difficult to predict how it impacts on the racing," Vettel said. "I just hope it doesn't split the cars too much, because what we had the last couple of years was a very tight battle between a lot of teams."

He said that despite his and Red Bull's dominance the sport was closer in recent years. "I think generally we had good races. Obviously the racing got criticised [in 2013] for some reasons that we can explain.

"But I don't think that is entirely fair because if you look back, it has always been like it has been the last five or six years. We've had very close championships, then we had championships which were not that close.

"But that is the way F1 has been in the past and it will probably continue like that in the future."